Question

When declaring an array like this:

int array[][] = {
    {1,2,3},
    {4,5,6}};

I get an error saying: “Array type has incomplete element type”

What is going on??

Answer 1

With an N-dimensional array (N>0), you need to define the sizes of N-1 dimensions; only one dimension can be left for the compiler to determine, and it must be the first dimension.

You can write:

int d1[] = { ... };
int d2[][2] = { ... };
int d3[][2][3] = { ... };

Etc.